Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.82654
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_pittsburgh
Final energy-1.8265357099hartree
Shots256
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_pittsburgh
- Resource type
- ibm quantum hardware
- Processor family
- Heron r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 256
- Precision
- 0.0625
- Resilience
- 0
- Submitted
- 2026-03-02T23:57:16+01:00
- Wall time (s)
- 235
Molecular system
- Charge
- 0
- Multiplicity
- 1
- Basis
- STO-3G
- Active space
- 2e,2o
- Active electrons
- 2
- Spatial orbitals
- 2
- Geometry units
- angstrom
Circuit
- Logical qubits
- 1
- Physical qubits
- —
- Parameters
- —
- Depth
- 1
- Two-qubit gates
- 0
- Hamiltonian terms
- —
Dataset publication
Associated articles
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware submitted to Quantum Science and Technology
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware DOI 10.48550/arXiv.2604.11478 arXiv 2604.11478 published preprint
Compute access
- Fraunhofer Quantum Now and EQeS · IBM Quantum · allocation: Fraunhofer Quantum Now
Optimization trajectory
23 recorded objective evaluations. Charts use cumulative time so convergence cost remains comparable across calculations.
| Attempt | Outcome | Energy (Ha) | Elapsed (s) | Quantum (s) | Parameters |
|---|---|---|---|---|---|
| 1 | succeeded | -1.7973979799 | 9.09124 | 1 | — |
| 2 | succeeded | -0.5896931926 | 8.2934 | 1 | — |
| 3 | succeeded | -0.8206875055 | 9.43339 | 1 | — |
| 4 | succeeded | -1.3245263528 | 8.98688 | 1 | — |
| 5 | succeeded | -1.7765073513 | 7.89347 | 1 | — |
| 6 | succeeded | -1.7860897799 | 9.31556 | 1 | — |
| 7 | succeeded | -1.8149326408 | 8.29146 | 1 | — |
| 8 | succeeded | -1.8265357099 | 9.89876 | 1 | — |
| 9 | succeeded | -1.6230576193 | 8.18499 | 1 | — |
| 10 | succeeded | -1.8188957240 | 8.81886 | 1 | — |
| 11 | succeeded | -1.6759043392 | 9.19081 | 1 | — |
| 12 | succeeded | -1.7666126763 | 9.3669 | 1 | — |
| 13 | succeeded | -1.8013871290 | 9.60141 | 1 | — |
| 14 | succeeded | -1.7409004232 | 9.27355 | 1 | — |
| 15 | succeeded | -1.7657715123 | 9.81175 | 1 | — |
| 16 | succeeded | -1.7236606314 | 9.41323 | 1 | — |
| 17 | succeeded | -1.7680348900 | 33.388 | 5 | — |
| 18 | succeeded | -1.7296009119 | 9.2989 | 2 | — |
| 19 | succeeded | -1.7897927486 | 9.29231 | 1 | — |
| 20 | succeeded | -1.7719892845 | 8.10671 | 1 | — |
| 21 | succeeded | -1.7895152568 | 9.07286 | 1 | — |
| 22 | succeeded | -1.7700120872 | 11.7798 | 1 | — |
| 23 | succeeded | -1.7660576927 | 8.8096 | 1 | — |